Information Processing Device, Information Processing Method, and Program

2. The information processing device as claimed in claim 1, wherein the processing circuitry obtains, for each document in an input group of documents, the answer range and the answer suitability of the document with respect to the question.

4. The information processing device as claimed in claim 3, wherein the processing circuitry calculates the answer candidate score by a sum total of the answer suitabilities, a weighted mean of the answer suitabilities, or a weighted sum of the answer suitabilities for the documents having the same string extracted as the answer candidate.

7. The information processing device as claimed in claim 1, wherein the first neural network is constituted with a plurality of neural networks each of which corresponds to one of a plurality of ranges as the answer range indicating answers at a plurality of levels of granularity, and between the second neural network and the plurality of neural networks, part of the layers constituting these neural networks is shared.

8. The information processing device as claimed in claim 7, wherein the processing circuitry is further configured to output a range having a most appropriate level of granularity as the answer range, based on the plurality of ranges indicating the answers having the plurality of levels of granularity calculated by the plurality of neural networks.

9. The information processing device as claimed in claim 8, wherein the range having the most appropriate level of granularity corresponds to one of a phrase, a paragraph, and a document.

10. A non-transitory computer-readable recording medium having a program stored thereon for causing a computer to function as the processing circuitry in the information processing device as claimed in claim 1.

13. A non-transitory computer-readable recording medium having a program stored thereon for causing a computer to function as the processing circuitry in the information processing device as claimed in claim 6.